And now some more changes have cropped up. Like Lucasfilm itself released the above featurette that shows how the attack on the Death Star in Return of the Jedi will be teaked to add more X-Wing fighters. (Thank goodness, there are no changes that we know of to the original movie's Death Star sequence.)

Also, the approach to Jabba's front door will be tweaked somewhat to make the door look massive and fake:

And in a scene in the first movie when R2D2 is hiding behind some rocks, the rocks have now been digitally enlarged so that it makes no sense that Artoo could even have gotten back there: